The Collaborative International Dictionary of English v.0.48:

Scantiness \Scant"i*ness\, n.
   Quality or condition of being scanty.
   [1913 Webster]

WordNet (r) 3.0 (2006):

scantiness
    n 1: the quality of being meager; "an exiguity of cloth that
         would only allow of miniature capes"-George Eliot [syn:
         meagerness, meagreness, leanness, poorness,
         scantiness, scantness, exiguity]

Moby Thesaurus II by Grady Ward, 1.0:

70 Moby Thesaurus words for "scantiness":
   Lenten fare, austerity, chinchiness, chintziness, daintiness,
   dearth, defalcation, deficiency, deficit, delicacy, diminutiveness,
   exiguity, exiguousness, fewness, inadequacy, inconsequentiality,
   inconsiderableness, infrequency, insignificance, insufficiency,
   jejuneness, jejunity, lack, leanness, littleness, meagerness,
   meanness, minuteness, miserliness, moderateness, narrowness,
   niggardliness, paltriness, parsimony, paucity, pettiness,
   picayunishness, pokiness, poverty, puniness, rareness, rarity,
   restrictedness, scant sufficiency, scantness, scarceness, scarcity,
   scrawniness, scrimpiness, shortage, shortness, skimpiness,
   slenderness, slightness, slim pickings, slimness, smallness,
   spareness, sparseness, sparsity, stinginess, stringency, thinness,
   tightness, tininess, triviality, uncommonness, underage, undersize,
   unimportance